What does it mean for an address to be invalid in context (error code OS 10049)?

Question

I'm trying to start an instance of Apache 2.2 server with a fairly-close-to-standard configuration file. I made one small change because I want Apache to serve a single XML file separately from everything else it does, purely for testing on my local machine. The change is that I inserted this into httpd.conf:

# Based on http://httpd.apache.org/docs/2.2/vhosts/examples.html

Listen 10.11.12.13:85

NameVirtualHost 10.11.12.13:85

<VirtualHost 10.11.12.13:85>
DocumentRoot "C:\foo\bar"
ServerName www.MyCompanyMyProjectFooBarTestURL.com
</VirtualHost>

Attempting to start Apache resulted in this:

(OS 10049)The requested address is not valid in its context. : make_sock: could not bind to address 10.11.12.13:85
no listening sockets available, shutting down
Unable to open logs

No instances of Apache are running. Nothing is using port 85 (or 80 or 8080). There's nothing special about 10.11.12.13:85; I just figured that was an IP that wouldn't interfere with anything.

What does this error mean, and how can I resolve it?

Answer 1

Make sure that the IP is configured on an network interface that is UP.

To add an IP to a network interface on Windows 7 you can follow the HOWTO from http://www.pctips3000.com/how-to-assign-more-than-one-ip-address-to-one-lan-in-windows-7/

If you have DHCP, then you might need to do some Registry tricks like: http://www.petri.co.il/configure_tcp_ip_to_use_dhcp_and_a_static_ip_address_at_the_same_time.htm or just use static IP allocation.

Answer 2

There could be reason the IP address you are pointing is generic one. For example:-10.1.1.233:443 And you get error >>> (OS 10049)The requested address is not valid in its context. : make_sock: could not bind to address 10.1.1.233:443

comment the line in httpd-ssl.conf and start the Apache